San Joaquin River

River in California, read from 10 USGS gauges, draining about 13,539 square miles. Figures refresh every fifteen minutes.

Discharge

1,010

cfs · 1h ago

Normal for today

1,670

cfs median, 98 yrs

Water temp

°F · 1h ago

Gage height

7.95

Below normal for the date60% of medianUSGS gauge 11303500

Thirty-day mean discharge · 515–1,180 cfsdashed line: today’s long-term median

Gauges on this water

Reading by reach

Station	Flow	Temp	Updated
SAN JOAQUIN R NR VERNALIS CA11303500	1,010 cfs	69°F	1h ago
SAN JOAQUIN R NR CROWS LANDING CA11274550	286 cfs	73°F	30 min ago
SAN JOAQUIN R NR NEWMAN CA11274000	250 cfs	—	15 min ago

Reading the number

On this date the gauge has averaged 1,670 cfs over 98 years of record, with the middle half of years falling between 1,120 and 2,550 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.

Regional hatch calendar

What is likely hatching near San Joaquin River

San Joaquin River does not have its own verified chart yet. This calendar is combined from the verified charts on East Walker River (97 mi), Carson River (129 mi). Treat it as regional timing, and file a report if you see something different here.

Month-by-month insect activity for San Joaquin River
Insect	J	F	M	A	M	J	J	A	S	O	N	D
Blue-Winged Olive	January: active	February: active	March: peak	April: peak	May: active	June: absent	July: absent	August: absent	September: active	October: peak	November: peak	December: active
Caddis	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: peak	August: peak	September: active	October: active	November: absent	December: absent
Midge	January: peak	February: peak	March: peak	April: peak	May: active	June: active	July: active	August: active	September: active	October: peak	November: peak	December: peak
Pale Morning Dun	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: peak	August: active	September: absent	October: absent	November: absent	December: absent
Golden Stonefly	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: peak	August: active	September: absent	October: absent	November: absent	December: absent

PeakActiveAbsent

Reports

From anglers on San Joaquin River

No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.